"It's time again, to do another How-to guide. This time, I will be taking you step by step on how to install a 120mm blowhole ontop of your case. Why on top? Well, it's been known that heat rises, therefore all the heat in your case will rise to the top of your case, but has nowhere to go. That is where the blowhole comes in to play. This 120mm Panaflo Highfan fan blows 103.8 CFM!! but be aware, the noise of it (in decibles) is 41.5 dBA! That much noise might
drive you crazy. If you think it would, you might want to purchase the Panaflo 120mm Low Fan, which is easier on the ears @ 30 dBA but you will loose some air flow over the High Fan as it is only 68.9 CFM."